CrapoRO, MorrisAH, GardnerRM. Reference spirometric values using techniques and equipment that meet ATS recommendations. Am Rev Respir Dis1981;123(6):659–664.
2.
MehtaAC, HarrisRJ, De BoerGE. Endoscopic management of benign airway stenosis. Clin Chest Med1995;16(3):401–413.
3.
KavuruMS, EliacharI, SivakED. Management of the upper airway in the critically ill patient: the high risk patient management of the critically ill. 3rd edition. Baltimore: Williams & Wilkins; 1995. Pgs 189–211.
4.
StollerJK. Spirometry: a key diagnostic test in pulmonary medicine. Cleve Clin J Med1992;59(1):75–78.
5.
GolishJA, AhmadM, YarnalJR.Practical application of the flow-volume loop. Cleve Clin Q1980;47(1):39–45.
